On this page
Identify the mistaken inference
A page updated in 2026 can still list a factor file released in 2025. Labeling the chosen row a 2026 factor solely from the page footer introduces a version that the file itself may not support.
Use the observed source distinction
The EPA hub inspected on 10 October 2026 showed a January 2026 webpage update but a listed 2025 annual release. This is why the factor-source record should identify the actual file and row, not only the date the web page changed.
Record the separate dates
| Field | Evidence |
|---|---|
| Dataset version | File title or release identifier |
| Data coverage | Documentation for the selected row |
| Web access date | Date of source inspection |
| Activity period | Dates of the activity being calculated |
Review any resulting comparison
If one period was labeled using a different convention, reconcile the versions before comparing emissions. A corrected label alone may not change the product, but a changed factor row can.